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Mixer machine
- this page is a stub
The TP-845-A was a complete mixer encryption unit
based on the Vernam Cipher. It was built around 1970 by
ACEC in Charleroi (Belgium) and was used by the Belgian Army (ABL).
It was suitable for both online and offline enciphering and could
be used with ordinary telephone lines as well as over radio. In the latter case
it was often used in combination with the AN/GRC-9.
The keyboard of the machine has the same layout as a French typewriter
(AZERTY), suggesting that it was probably used in a French-speaking country,
such as France or the French-speaking part of Belgium (Wallonia).
Unlike other sytems like Hagelin
and Philips,
that use the more common Murray code (Baudot),
the TP-845-A uses a multi-tone system,
known as Coquelet-13 code
[3].
This made the ACEC machine incompatible with other NATO systems.
The complete TP-845-A system, consists of the following items:
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- TP-B6-A Teleprinter (with built-in paper puncher)
- CTS-A Cryptographic unit (with double paper-tape reader)
- B6-A Power Supply Unit (PSU)
- Canvas bag with cables and spare parts
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This cipher machine has recently been donated to the Crypto Museum.
We are currently investigating and restoring it and hope to be able to
descibe it in more detail inn due course. If you have any information about
this machine and its use, please contact us.
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© Copyright 2009-2013, Paul Reuvers & Marc Simons. Last changed: Friday, 10 January 2014 - 11:24 CET
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